.dv-border-box-10 {
  position: relative;
  width: 100%;
  height: 100%;
  box-shadow: inset 0 0 25px 3px #1d48c4;
  border-radius: 6px;
}
.dv-border-box-10 .border {
  position: absolute;
  display: block;
}
.dv-border-box-10 .right-top {
  right: 0px;
  transform: rotateY(180deg);
}
.dv-border-box-10 .left-bottom {
  bottom: 0px;
  transform: rotateX(180deg);
}
.dv-border-box-10 .right-bottom {
  right: 0px;
  bottom: 0px;
  transform: rotateX(180deg) rotateY(180deg);
}
.dv-border-box-10 .border-box-content {
  position: relative;
  width: 100%;
  height: 100%;
}